A member asked:

What is considered a normal oxygen saturation for a person with copd and why is it considered normal?

A doctor has provided 1 answer
Dr. Michelle Zetoony answered

Specializes in Sleep Medicine

Anything above 90%: > or equal to 90% is normal. This is related to the hemoglobin oxygen dissociation curve. There is a certain percentage of oxygen saturation before your cells will not let oxygen leave cell and go to tissue. That is somewhere around 88-92% so since the sensors are good only 90% + or - 2% points, we use 90%.

Answered 1/25/2021



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